A ring Autobahn round Munich was planned in 1938, but war intervened and construction was deferred. Sections of the road were constructed to the north and east of the city in the 1960s and 1970s, following a route significantly further from the city centre than the ring planned in the 1930s. In an interview published in 1977 Munich Mayor Georg Kronawitter questioned whether it was necessary ever to close the ring completely. At that stage appeared that a full "closed ring" Autobahn was not in prospect before 2000.
By 2009 further sections to the north and west had been constructed, but the ring was still "incomplete". Building a final section to the south of the city has become a contentious political issue, subject of several politically commissioned studies during the early years of the twenty-first century.